Value Collection 31310 Uss Flat Washer 1 in Steel Zinc

Product Description

The VALUE COLLECTION 31310 is a USS flat washer designed for 1-inch screw sizes, manufactured from steel with a zinc-plated finish for corrosion resistance. This washer follows USS (United States Standard) dimensional standards, providing a larger outer diameter relative to the screw size compared to SAE washers, which distributes load more effectively across the mating surface. With an inside diameter of 1.055 inches, an outside diameter of 2.53 inches, and a thickness of 0.192 inches, it is suited for general fastening applications in mechanical, structural, and maintenance work. Plumbers, electricians, HVAC technicians, and general tradespeople commonly stock USS flat washers for a wide range of bolted connections.

This washer is used wherever a 1-inch fastener requires a broad bearing surface to prevent pull-through or distribute clamping load across softer or oversized hole materials. Typical applications include equipment mounting, pipe hangers, structural connections, and general mechanical assembly in both residential and light commercial settings. The zinc-plated steel construction makes it appropriate for indoor and semi-protected outdoor environments where moderate corrosion resistance is needed.

Key Features

• USS standard dimensions provide wider load-bearing surface than SAE equivalents for the same screw size
• Steel construction with zinc-plated finish offers corrosion resistance in dry and semi-protected environments
• 1.055-inch inside diameter fits 1-inch nominal screw or bolt shafts with standard clearance
• 2.53-inch outside diameter distributes clamping force across a broad contact area
• 0.192-inch thickness provides consistent bearing surface under torque
• Material Grade 2 steel suitable for general-purpose fastening applications

Compatibility

Designed as a standard USS flat washer for use with 1-inch nominal screws and bolts in general-purpose mechanical, plumbing, HVAC, and electrical fastening applications.

Installation Notes

Install using standard hand or power tools appropriate to the fastener being used. Ensure the mating surface is clean and flat before placing the washer to prevent uneven load distribution. Power down or de-energize equipment before servicing any fastened assembly. Do not use zinc-plated washers in highly corrosive or submerged environments where stainless steel or hot-dip galvanized hardware is required by code.